How to stop checking your spelling , other

Press the 'setting' button First.

Press to 'General' Button

Press to 'Keyboard' Button

As you can see all of them are 'On'

Make it off 'Auto-Capitalisation' (If you don't want it) (And you don't want your sentences to be on capital letter automatically)

Make it off 'Auto-Correction (If you don't want it) (And you don't want your sentences to be on checked automatically)

Make it off 'Check Spelling' (If you don't want it) (And you don't want your sentences to be on check your spelling automatically)